I have been reading a thread about spark plugs. Most people dont change it for awhile. I only have 13,000 miles and they need to be replaced already. I had a boost leak and I was driving the car for maybe 3000 miles. Is this the reason why?

 

How do you know they need to be replaced? Lot of carbon build up? Stock plugs should last a long time. They're expensive as well so you hope you don't replace them every other weekend unless you switch to copper or something.

 

I checked them last night and they were really pointy. Not flat anymore. I was thinking the same that they would last long since they are iridiums..

 

I thought the electrodes on iridiums were pointy to start with?

 

NGK's all the way. don't use BOSCH..those were only meant to be in German cars.

 

pointy? i thought you tell if spark plugs need replacing due to the color and **** off the plug not the electorde tip condition?

 

I use ngk coppers and they are dead after 6-7k, whatever, cheap and easy to replace

 

i replace mine every oil change just to be safe. i dont know about you guys but i love my car so spending like $20 extra for plugs on a oil change i am glad to do. Go with NGK BPR8ES

 

i change my plugs every oil change, which is about 700 miles in my case

 

I replace mine every tank of gas, are you kidding! the spark plugs should last you a long time!

 

Dont get confused with all the Evo VIII people posting. The IX plugs cost $50.00 a set for OEM, lots more for 1 step colder. You want them to last as long as possible.

The guys that are changing them all the time are running probably running a copper plug that costs a few dollars. Yes a boost leak will cause your car to run rich under boost and could have fouled your plugs. These cars run pig rich to begin with and a boost leak will just make it worse.

Be careful, not many plugs will fit in a IX and most people run the OEM plugs, you can get them on sparkplugs.com by looking up the part number (owners manual).

 

Thanks. I will be picking som up at the dealership tomorow.

 

Just change your plugs every oil change. For something that only cost a 1.75 a plug why would you wait? I treat oil changes and plugs changes like they where a fill up at my local shell. $28 for a oil change and plugs.

 

I replace mine every 15k but I do track my car...you can probably get away with replacing it every 30k if you only DD your car

 

anyone know if im running really rich if a fouled plug could cause a major power loss?

i feel like i've lost about 20 whp i have no boost leaks but i know the car runs quite rich from my dyno sheet. i feel the loss mainly in the torque but i know it's just plain lost power. clutch is good im coming up on 10k miles but my tune has been on for about 6k miles